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The BMH23M001 is a 24-bit ADC module which has a built-in IC, the BH45B1225. You can use sensors based on the Wheatstone bridge principle with the module and read ADC values via I2C interface.
| Select | Quantity | Discount | Unit price |
| 1-9 | - | US$3.00 | |
| 10+ | 5% | US$2.85 |
The BMH23M001 includes 2-channel ADC input interfaces and LDO to ensure measurement results accurate and stable. The module’s pins were designed to match the BMCOM connectors and can directly connect to BMduino development boards, such as BM53A367A. You can use the product with other development boards, such as Arduino UNO, as well.
| Pin | Name | Function |
|---|---|---|
| 1 | NC | - |
| 2 | SCL | I2C: clock line |
| 3 | SDA | I2C: data line |
| 4 | VDD | Power supply: 3.3V～5.5V |
| 5 | GND | Ground |
| 6 | GND | Ground (Analog) |
| 7 | AN3 | A/D converter input channel 3 |
| 8 | AN2 | A/D converter input channel 2 |
| 9 | AVDD | VDD (Analog) | 10 | GND | Ground (Analog) |
| 11 | AN1 | A/D converter input channel 1 |
| 12 | AN0 | A/D converter input channel 0 |
| 13 | AVDD | VDD (Analog) |
| Part number | BMH23M001 | BMH23M002 |
|---|---|---|
| 24-bit ADC IC | BH45B1225 | BH45B1525 |
| Input voltage | 3.3V~5.5V | 3.3V~5.5V |
| Operating current | 1mA @5V | 2.5mA @5V |
| ENOB | 21.9 bits: Max.
20.7 bits: Gain = 32 20.1 bits: Gain = 64 9.4 bits: Gain = 128 |
22.8 bits: Max.
22.4 bits: Gain = 32 21.8 bits: Gain = 64 20.9 bits: Gain = 128 |
| Interface | I2C | SPI / I2C (default) |
| I2C address | 0x68 (default) | 0x68 (default) |
| Input | Two channels (input)
Analog signal x 1 (AN2, AN3) Wheatstone bridge x 1 (AN0, AN1) |
Two channels (input)
Analog signal x 1 (AN2, AN3) Wheatstone bridge x 1 (AN0, AN1) |
| HS Code (reference) | 8473.50.00.00-1 |
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